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On 10/14/2015 11:14 AM, Zhenyu Zheng wrote:
> I think it will be better if you can submit a spec for your proposal, 
> it will be easier for people to give comment.

OK, will submit one soon.

Thanks.

>
> On Wed, Oct 14, 2015 at 10:05 AM, Tang Chen <tangchen at cn.fujitsu.com 
> <mailto:tangchen at cn.fujitsu.com>> wrote:
>
>     Hi, all,
>
>     Please help to review this BP.
>
>     https://blueprints.launchpad.net/nova/+spec/live-migration-state-machine
>
>
>     Currently, the migration_status field in Migration object is
>     indicating the
>     status of migration process. But in the current code, it is
>     represented
>     by pure string, like 'migrating', 'finished', and so on.
>
>     The strings could be confusing to different developers, e.g. there
>     are 3
>     statuses representing the migration process is over successfully:
>     'finished', 'completed' and 'done'.
>     And 2 for migration in process: 'running' and 'migrating'.
>
>     So I think we should use constants or enum for these statuses.
>
>
>     Furthermore, Nikola has proposed to create a state machine for the
>     statuses,
>     which is part of another abandoned BP. And this is also the work
>     I'd like to go
>     on with. Please refer to:
>     https://review.openstack.org/#/c/197668/
>     https://review.openstack.org/#/c/197669/
>
>
>     Another proposal is: introduce a new member named "state" into
>     Migration.
>     Use a state machine to handle this Migration.state, and leave
>     migration_status
>     field a descriptive human readable free-form.
>
>
>     So how do you think ?
>
>     Thanks.
>
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